/*
 * Copyright 2000-2006 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.intellij.gwt.references;

import com.intellij.gwt.module.GwtModulesManager;
import com.intellij.gwt.module.model.GwtModule;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiLiteralExpression;
import com.intellij.psi.PsiReferenceBase;
import com.intellij.psi.xml.XmlFile;
import org.jetbrains.annotations.Nullable;

/**
 * @author nik
 */
public abstract class BaseGwtReference extends PsiReferenceBase<PsiLiteralExpression> {
  protected final GwtModulesManager myGwtModulesManager;

  public BaseGwtReference(PsiLiteralExpression element) {
    super(element);
    myGwtModulesManager = GwtModulesManager.getInstance(myElement.getProject());
  }

  public @Nullable XmlFile getHtmlFileForModule() {
    final GwtModule module = findGwtModule();
    if (module == null) return null;

    return myGwtModulesManager.findHtmlFileByModule(module);

  }

  public @Nullable GwtModule findGwtModule() {
    final PsiFile psiFile = myElement.getContainingFile();
    if (psiFile == null) return null;

    VirtualFile virtualFile = psiFile.getVirtualFile();
    if (virtualFile == null) {
      final PsiFile originalFile = psiFile.getOriginalFile();
      if (originalFile != null) {
        virtualFile = originalFile.getVirtualFile();
      }
      if (virtualFile == null) return null;
    }

    return myGwtModulesManager.findGwtModuleByClientSourceFile(virtualFile);

  }
}
